User blog comment:KanameTousen/Vergil wants to be Sparda!/@comment-4720688-20120521163844

Umm... I don't think that's why Nero came into existence.... He probably wasn't intentional; Vergil was probably just, um... Scratching an itch, so to speak...

Plus Sparda MARRIED the mother of his children (presumable she before she became so). Having kids and having a family are two different things.